The Cyrillians began making use of turbine-powered, floating transports on their homeworld prior to 189 BBY, and they developed the small DUM-series pit droid model to help carry out maintenance on the vehicles. The droids were used in particular for jobs requiring small size, such as moving under a hovering vehicle or climbing into a circuitry bay. Cyrillia became a part of the galacticpodracing circuit in 189 BBY, and the inhabitants made use of large numbers of pit droids to service and fuelpodracers taking part in the competitions.[1] In 122 BBY, Cyrillia ceased to be part of the podracing circuit, but the pit droids had become so popular that the large droid-manufacturing company, Serv-O-Droid, Inc., made a deal with the Cyrillians to distribute the model. The Cyrillians gave up ownership but agreed to continue making it; in return, the company financed the building of factories on Cyrillia and handled distribution and advertising, with the Cyrillians also still receiving some profit.[1]